KR960005459B1 - Moisturizing cosmetics - Google Patents

Abstract

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Description

Moisturizing cosmetics

The present invention relates to cosmetics, and more particularly cosmetics having a high moisturizing effect with sustainability.

The stratum corneum of normal skin usually contains 10-20% of moisture, which gives elasticity and flexibility and maintains protection.However, when moisture content is less than 10% due to changes in external environment such as temperature and humidity, it is called dry skin. It is known that the skin becomes elastic and loses its protective function, causing various skin problems.

In order to prevent such dry skin or to restore normal skin condition, a hydrophilic moisturizer is blended into cosmetics. Commonly used hydrophilic humectants include polyol compounds such as polyethylene glycol, polypropylene glycol, dipropylene glycol, propylene glycol, butylene glycol, glycerin, sorbitol, maltitol, amino acids, sodium pyrrolidone carboxylate, urea , Lactic acid, hyaluronic acid, collagen. However, since these moisturizing agents have high hydrophilicity, normal skin does not penetrate into the stratum corneum, remains on the skin, is inadequate, and exhibits only a temporary moisturizing effect.

In this situation, the present inventors have studied diligently to obtain a cosmetic having a long-lasting and high moisturizing effect. As a result, when the compound is used together with a liquid diglyceride and a polyol moisturizer at room temperature, each of them is used alone. It shows a higher moisturizing effect than when done. In addition, the present inventors have found that the persistence of this effect increases synergistically, thereby completing the present invention.

The present invention provides a cosmetic comprising (A) a diglyceride which is liquid at room temperature and (B) a polyol moisturizing component which is freely dissolved in (A) component at room temperature.

As (A) component used by this invention, the thing of melting | fusing point 20 degrees C or less is used as diglyceride which is liquid form at room temperature. Such components may be isolated or purified from glycerin esters of fatty acids containing 60% or more of the diester obtained by esterification of glycerin fatty acids, oily glycerol of natural animals or plants, or molecular distillation of higher fatty acid-higher alcohol esters. And glycerol by solvent extraction or the like. Of these, di (2-ethylhexanoic acid) glycerin ester, dioctanoic acid glycerin ester and dioleic acid glycerin ester are particularly preferable. The diglyceride of (A) component is 1-50 weight% in cosmetics, Preferably it is 5-25 weight%.

The polyol type moisturizing component of component (B) needs to be mixed with the diglyceride of component (A) at any ratio at room temperature. Examples of these (B) components include polyethylene glycol, polypropylene glycol, dipropylene glycol, propylene glycol, butylene glycol, hydroxypropyl etherified glycolipide ester (PSL), and the like. Among these, dipropylene glycol and butylene glycol are particularly preferable in consideration of dissolution characteristics of the component (C) with the hydrophilic moisturizing component. Moreover, PSL represented as the following general formula can be used preferably.

Wherein R ¹ represents CH ₃ or H, and when R ¹ is CH ₃ , R ² represents a saturated or unsaturated hydrocarbon group having 11 to 15 carbon atoms, and when R ¹ is H, R ² represents 12 to 16 carbon atoms. A saturated or unsaturated hydrocarbon group of

를 나타내며, R³은 탄소수 1내지 20의 포화 또는 불포화 탄화수소기 또는 (A)_hH를 나타내며, a, b, c, d, e, f, g, h는 그의 합계가 1~60의 정수를 나타낸다.A is

R ³ represents a saturated or unsaturated hydrocarbon group having 1 to 20 carbon atoms or (A) _h H, and a, b, c, d, e, f, g and h each represent an integer of 1 to 60. Indicates.

The polyol moisturizing component of component (B) is 2 to 90% by weight, preferably 5 to 50% by weight in cosmetics. If the blending amount is less than 2% by weight, the effect of the present invention is not exerted, and if it is used in excess of 90% by weight, the increase in the moisturizing sustaining effect proportional to the amount used is not seen. Moreover, although the mixing ratio of (A) component and (B) component is arbitrary, (A) / (B) is near 1/2.

Examples of the hydrophilic moisturizing component of component (C) include glycerin, sorbitol, maltitol, amino acids, sodium pyrrolidone carboxylic acid, natural humectants such as urea, lactic acid and hyaluronic acid, and chemically modified collagen.

These hydrophilic moisturizing ingredients are blended 2-25% in cosmetics. The cosmetics of the present invention may be suitably blended with various components generally used as cosmetic ingredients in addition to the above essential ingredients in a range that does not impair the effects of the present invention.

As these components, surfactant, a moisturizer other than the above-mentioned, a ultraviolet absorber, a chelating agent, a pH adjuster, a preservative, a thickener, a pigment, a fragrance | flavor, etc. are mentioned.

Cosmetics according to the present invention can be formed in any formulation such as oily cosmetics, emulsified cosmetics, aqueous cosmetics, and the like, and are particularly preferable as skin cosmetics and hair cosmetics that require moisturizing effects such as coarse skin and hair loss.

Cosmetics of the present invention have a high moisturizing effect and a long lasting effect of moisturizing effect, and also maintains excellent moisturizing properties over time and after washing, thus having a high effect on skin, hair care, especially damaged skin and hair care. To display.

The present invention will be further described in detail by the following examples, but the present invention is not limited thereto.

Example 1

The mixture of the composition shown in following Table 1 was prepared, and the moisture retention effect was measured.

TABLE 1

^* 2-ethylhexanoic acid diglyceride

[Test Methods]

The sample was applied to the inside of the front forearm in a predetermined amount and left to rest for 1 hour, and then washed with hot water. The temperature of 20 ° C. and 50% humidity were placed in a humidity chamber, and after 15 minutes, the moisture content in the stratum corneum was measured by an impedance meter (IBS company Product). After 2 hours, the mixture was washed with hot water again, and after 15 minutes, the water content was measured in the same manner. The results are shown in Table 2. In the table, the moisture content (unit: μυ) is expressed as an average value (N = 10).

[result]

TABLE 2

As is apparent from Table 2, the dipropylene glycol / diglyceride mixed system of the present invention 1 has a superior moisturizing effect and a sustaining effect, and synergistically acts as compared to a cosmetic formulated with diglyceride and dipropylene glycol alone. Proved to be. Moreover, in this invention 2, addition of (C) component also turned out to be effective.

Example 2

To prepare a cream of the composition shown in Table 3 below to measure the moisturizing lasting effect.

[Furtherance]

TABLE 3

^* POE (20): Polyoxyethylene with 20 mol oxyethylene group added

^** Mixture of 10 parts 2-ethylhexanoic acid diglyceride and 9 parts octanoic acid diglyceride

[Manufacturing method]

The oily parts 1) -7) are mixed, dissolved in heat and maintained at 70 ° C, while the water phase parts 8) -11) are gradually added to emulsify as a mixer. The emulsion was cooled to 30 ° C. in a heat exchanger to obtain a cream (Invention 3).

Comparative Products 6 and 7 were prepared in the same manner.

[Test Methods]

The sample was applied to the inside of the front forearm in a predetermined amount, left for 2 hours, washed with hot water and placed in a constant temperature and humidity chamber with a temperature of 20 ° C. and a humidity of 40%. It was measured as. In addition, after washing with the initial hot water, even after 1 hour, 2 hours and 5 hours after washing with the same hot water, the amount of water in the keratin was measured. The results are shown in Table 3, and the water content (unit: μυ) in the table is expressed as an average value (N = 4).

[result]

TABLE 4

^* Unit: μυ

As is apparent from Table 4, the cream of the present invention has a high moisturizing effect compared to the creams of the comparative products 6 and 7 containing the polyol-based moisturizing agent diflohylene glycol and diglyceride, respectively. It has been proved that these components act synergistically even in the emulsion system.

Example 3

[Manufacturing method]

The oily ingredients in the above-mentioned prescriptions are mixed, dissolved in heat, and preserved at 70 ° C. The above-mentioned water phase component is heat-mixed similarly to 70 degreeC, and the oil phase mixture mentioned above is added to this water phase mixture, and emulsified as a mixer. The emulsion obtained was cooled to 30 ° C. as a heat exchanger to prepare an emulsion.

Example 4

[Manufacturing method]

POE (20) sorbitan tetraoleic acid ester and ethyl paraben are dissolved in oleic acid diglyceride, and ethanol is added to form an oil phase. Moreover, what dissolved 1, 3- butyl styrene glycol, dipropylene glycol, and a fragrance | flavor in purified water is made into a water phase. The oily mixture was added to the aqueous mixture at room temperature, and filtered with nylon cloth while stirring well to obtain a final product.

The cosmetics of the present invention obtained in Examples 3 and 4 showed excellent moisturizing sustaining effect.

Many modifications and improvements of the present invention are possible with the foregoing description. Accordingly, it is to be understood that the scope of the claims may be practiced otherwise than as specifically described herein.

Claims (3)

(A) 1 to 50% by weight of diglyceride, which is liquid at room temperature and has a melting point of 20 DEG C or less, and (B) polyethylene glycol, polypropylene glycol, dipropylene glycol, propylene glycol, butylene glycol, hydroxypropyl etherated glycolipide Moisturizing cosmetics, characterized in that containing 2 to 90% by weight of the compound selected from the group consisting of esters. The moisturizing cosmetic according to claim 1, wherein the moisturizing cosmetic contains (C) component having a solubility of 10% by weight or more relative to (B) component at room temperature. The moisturizing cosmetic according to claim 2, wherein the component (C) is selected from the group consisting of glycerin, sorbitol, maltitol, amino acids, sodium pyrrolidone carboxylate, urea and lactic acid.